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Priority claimed from DE8807843Uexternal-prioritypatent/DE8807843U1/de
Priority claimed from DE8807844Uexternal-prioritypatent/DE8807844U1/de
Application filed by Erich PfanstielfiledCriticalErich Pfanstiel
Priority claimed from EP89106974Aexternal-prioritypatent/EP0347546B1/de
Application grantedgrantedCritical
Publication of ATE94140T1publicationCriticalpatent/ATE94140T1/de